I have a set of the recent Aldi lights permanently on my commute bike. They were six quid, if they still have them in stock. If the light or weather is a bit iffy, I switch them on.
In my bag, I carry a Cateye ‘opticube’ strap on front light, as that has a better spread of light, plus a TL-LD1100 ‘holy hand grenade’ rear light. These were about £40 for a set. The front is reasonably new because my original was on a bike that got stolen, but the rear light has lasted years now.
I like the Cateye lights as you can buy all sorts of mounts for them, so they can easily be moved between bikes or mounted on odd tubes.
My commute’s only 30 minutes a day but the batteries last a full ‘dark season’ without having to remember to charge them each night/week which would be a pain.